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Article

Changes in Stream–Aquifer Interactions Due to Gate Opening of the Juksan Weir in Korea

1
Korea Institute of Geoscience and Mineral Resources, Daejeon 305350, Korea
2
Department of Geoenvironmental Sciences, Kongju National University, Kongju 32588, Korea
3
School of Civil and Environmental Engineering, Kunsan National University, Jeonbuk 54150, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Paolo Madonia
Water 2021, 13(12), 1639; https://doi.org/10.3390/w13121639
Received: 1 May 2021 / Revised: 31 May 2021 / Accepted: 7 June 2021 / Published: 10 June 2021
(This article belongs to the Section Hydrology)
The Juksan weir, installed in the Yeongsan river in South Korea from 2010 to 2012, has secured sustainable water resources and helped control flooding. However, low river flow velocities due to the weir have deteriorated the quality of the river water. For natural river restoration, the water gate was opened in 2017. In this study, the three-dimensional finite difference model Visual MODFLOW was used to analyze the effects of gate opening on stream–aquifer interactions. A conceptual model was developed to simulate the stream–aquifer dynamics caused by the operation of the water gate at the Juksan weir. Groundwater data were also analyzed to determine the impacts of weir operations on groundwater quality. Our results indicate that a lower river level due to the weir opening changed the groundwater flow, which then affected the water balance. The change in groundwater flow increased the variability of the groundwater quality which had homogenized because of induced recharge after the construction of the weir. This could affect groundwater use in agricultural areas near the weir. Therefore, further groundwater monitoring and hydrodynamic analyses are required to anticipate and address any potential issues. View Full-Text
Keywords: stream–aquifer interaction; Juksan weir; water gate operation of weir; groundwater flow model stream–aquifer interaction; Juksan weir; water gate operation of weir; groundwater flow model
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MDPI and ACS Style

Lee, H.; Koo, M.-H.; Lee, J.; Kim, K. Changes in Stream–Aquifer Interactions Due to Gate Opening of the Juksan Weir in Korea. Water 2021, 13, 1639. https://doi.org/10.3390/w13121639

AMA Style

Lee H, Koo M-H, Lee J, Kim K. Changes in Stream–Aquifer Interactions Due to Gate Opening of the Juksan Weir in Korea. Water. 2021; 13(12):1639. https://doi.org/10.3390/w13121639

Chicago/Turabian Style

Lee, Hyeonju, Min-Ho Koo, Juhyeon Lee, and Kangjoo Kim. 2021. "Changes in Stream–Aquifer Interactions Due to Gate Opening of the Juksan Weir in Korea" Water 13, no. 12: 1639. https://doi.org/10.3390/w13121639

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